Multi-view Drawings

I made a cow out of clay and I put it in the glass box. Then I was able to draw with marker on the box and see actual perspectives.

Multi-view Drawings

The purpose of construction lines is to give the drawing structure and proportion. The object lines are the actual lines of the object. The purpose of hidden lines is to represent part of the object that can not be seen from that particular view.  Center lines are to define the glass box around the object. Multiview drawings are useful and easier to understand.